The Mormon Trail or Mormon Pioneer Trail is the 1,300 mile (2,092 km) route that members of The Church of Jesus Christ of Latter-day Saints traveled from 1846 to 1868. Today the Mormon Trail is a part of the United States National Trails System, as the Mormon Pioneer National Historic Trail.The Mormon Trail extends from Nauvoo, Illinois, which was the principal settlement of the Latter Day Saints from 1839 to 1846, to Salt Lake City, Utah, which was settled by Brigham Young and his followers beginning in 1847. From Council Bluffs, Iowa to Fort Bridger in Wyoming, the trail follows much the same route as the Oregon Trail and the California Trail; these trails are collectively known as the Emigrant Trail.
The Mormon pioneer movement began in 1846 when, in the face of conflicts with neighbors, Young decided to abandon Nauvoo and to establish a new home for the church in the Great Basin. That year Young's followers crossed Iowa. Along their way, some were assigned to establish settlements and to plant and harvest crops for later emigrants. During the winter of 1846–47, the emigrants wintered in Iowa, other nearby states, and the unorganized territory that later became Nebraska, with the largest group residing in Winter Quarters, Nebraska. In the spring of 1847, Young led the vanguard company to the Salt Lake Valley, which was then outside the boundaries of the United States and later became Utah. During the first few years, the emigrants were mostly former occupants of Nauvoo who were following Young to Utah. Later, the emigrants increasingly comprised converts from the British Isles and Europe.